Oil prices climbed on Friday, extending sharp gains in the previous session as frigid weather swept across large swathes of the United States, threatening to further disrupt oil supplies.
Brent crude rose 34 cents, or 0.4%, to $91.45 a barrel by 0206 GMT, after rising $1.16 on Thursday.
US West Texas Intermediate crude rose 46 cents, or 0.5%, to $90.73 a barrel, having gained $2.01 cents the previous day to settle above $90 for the first time since October 6, 2014.
Both benchmarks are headed for their seventh straight weekly gain.
“WTI crude surged over the $90 level after an Arctic blast made its way to Texas and disrupted some oil production in the Permian Basin,” said Edward Moya, senior market analyst at OANDA.
